JPS58218344A - Top treatment in continuous casting - Google Patents
Top treatment in continuous castingInfo
- Publication number
- JPS58218344A JPS58218344A JP10118082A JP10118082A JPS58218344A JP S58218344 A JPS58218344 A JP S58218344A JP 10118082 A JP10118082 A JP 10118082A JP 10118082 A JP10118082 A JP 10118082A JP S58218344 A JPS58218344 A JP S58218344A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- steel
- iron plate
- molten steel
- continuous casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/148—Safety arrangements
Abstract
Description
【発明の詳細な説明】
この発明は連続鋳造終了時のトップ部の処理に関し、短
時間にトップ部に強大な表面固層を形成することを目的
としたものでるる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the treatment of the top portion at the end of continuous casting, and its object is to form a strong surface solid layer on the top portion in a short time.
周知の如く連続鋳造では鋳造終了時にキャスト鍛トップ
部を強制冷却し、その部分の凝固を促進させ、未凝固溶
鋼を鋳片内に封じ込めることＫより、鋳片内の未凝固溶
鋼の連鋳機内への流れ込み及びブリードによる連鋳ロー
ルへの地金付着等を防止する必要がある（このキャスト
最トップＯ冷却作業を以下トップ処理と呼ぶ）。As is well known, in continuous casting, the top part of the cast forge is forcibly cooled at the end of casting to promote solidification of that part and contain the unsolidified molten steel within the slab. It is necessary to prevent metal from flowing into the continuous casting rolls and from adhering to the continuous casting rolls due to bleeding (this casting top O cooling operation is hereinafter referred to as top treatment).
このトップ処理には、従来から一般に水が使用されてい
るが、水を用いる場合には水爆の危険性があるのみなら
ず、形成され、る表面凝固層が薄くて弱く、溶鋼流出及
びブリードの発生を完全に防止し得ないのが現状でるる
。Water has traditionally been used for this top treatment, but when water is used, not only is there a risk of hydrogen bombing, but the surface coagulation layer formed is thin and weak, resulting in the risk of molten steel flowing out and bleeding. Currently, it is not possible to completely prevent the occurrence.
この発明は上記従来法の欠点を完全に除去するため罠な
されたもので、鉄板を用いたトップ処理方法を提供する
ものである。This invention has been made to completely eliminate the drawbacks of the above-mentioned conventional methods, and provides a top processing method using an iron plate.
この発明によれば、鋳造終了時のトップ部に、溶鋼湯面
下に挿入された鉄板と、この鉄板の冷却効果により形成
された鉄板周囲の凝固シェルとの相乗作用により厚みが
十分に厚い強固な固層が形成されるものである。そして
この強固な固層の形成によシ鋳片内の未凝固溶鋼の流出
及びブリードが完全に防止でき、従来の欠点が容易に排
除されるものである。しかも水を用いていなｉために。According to this invention, the top part at the end of casting has a sufficiently thick and strong structure due to the synergistic effect of the iron plate inserted below the surface of the molten steel and the solidified shell around the iron plate formed by the cooling effect of this iron plate. A solid layer is formed. By forming this strong solid layer, the outflow and bleeding of unsolidified molten steel within the slab can be completely prevented, and the drawbacks of the conventional method can be easily eliminated. Moreover, it does not use water.
水爆の心配は全くな−ものである。There is no need to worry about hydrogen bombs.
以下この発明の実施例を図面により詳しく説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図はこの発明において使用する鉄板の一例を示した
もので、鉄板本体１は所定の厚みを有し、且つその一形
状は鋳型内水平面形状とはソ近似していてその四角がカ
ットされてｉる。この鉄板本体１の上［ｉｉｉ［は熱応
力による変形防止のためＯ補強板２が溶接されていると
共に％竺板本体１が鋳屋内の溶鋼中において水平状態に
保ち易い様に所定高さを有するアーングル３が溶接され
ている。４は、鉄板本体ＩＫ設は次ガス抜き孔で、これ
は鉄板本体１′ｆｒｆｓ型内の溶鋼中に挿入後、鉄板本
体ＩＦＣ＞溶鋼から発生するガスを抜くためのものでる
る。Fig. 1 shows an example of an iron plate used in the present invention.The iron plate main body 1 has a predetermined thickness, and its shape is similar to the shape of the horizontal plane in the mold, and its squares are cut. I'm here. On this iron plate body 1 [iii The angle 3 with which it is attached is welded. 4 is a gas vent hole next to the iron plate main body IK, which is used to vent gas generated from the iron plate main body IFC>molten steel after it is inserted into the molten steel in the iron plate main body 1'frfs mold.
５は鉄板本体１の上面に溶、接された持手で、この持手
５を作業者が持って鉄板本体１を鋳屋内溶鋼中に挿入す
ると共に挿入さｌ＃した鉄板本体１が溶鋼中で凝−々着
されるまで水）：羊状態に保持する。尚、との持手５は
、鉄板本体１が凝固々着後上下、左右に動かせば溶鋼□
熱によ）ｉ板本体１から容易に取去ることが出来る。Reference numeral 5 denotes a handle that is welded and attached to the upper surface of the iron plate body 1. The operator holds this handle 5 and inserts the iron plate body 1 into the molten steel in the casting, and the inserted iron plate body 1 is inserted into the molten steel. Water): Hold in sheep state until it becomes sticky. In addition, the handle 5 can be moved up and down and left and right after the iron plate body 1 has solidified, and the molten steel □
(by heat) can be easily removed from the i-board main body 1.
以上述べた形状を有する鉄板ｔ−＝Ｖヤスト最トップ部
に挿入する。以下にその手順を説明する。鋳造終了後、
鋳屋内より浸没ノズルを除去した後、オペレーターが鉄
板の持手５ｔ−持ち第２図に示すように鋳型の短辺側６
より鉄板を挿入し、鉄板をメニスカス上部９より若干溶
゛鋼７中に沈め、鉄板の周囲が鋳臘内の凝固シェルに拘
束されるまで鉄板を水平に保つ。この時、鉄板上面に鉄
板下面から溶鋼かめふれ、持手５と鉄板の溶接部を溶解
させるため、持手５ｔ−取シ外すことができ、鋳片を瞳
害なしに引き抜くことができる。この間の作業は約１公
租度で、鉄板挿入オペレーターも一人で十分でるり、迅
速かつ容易な作業が可能となっている。Insert the iron plate having the shape described above into the topmost part of the t-=V cast. The procedure will be explained below. After casting,
After removing the immersion nozzle from the casting chamber, the operator holds the iron plate handle 5t and holds it on the short side 6 of the mold as shown in Figure 2.
The iron plate is inserted further into the molten steel 7 from the upper part of the meniscus 9, and the iron plate is kept horizontal until the periphery of the iron plate is restrained by the solidified shell in the cast iron. At this time, the molten steel spills from the lower surface of the iron plate to the upper surface of the iron plate, and the welded part between the handle 5 and the iron plate is melted, so the handle 5t can be removed and the slab can be pulled out without causing any damage to the eyes. The work during this time is about 1 minute, and only one operator is required to insert the iron plate, making the work quick and easy.
第３図は、上記の処理によってトップ部に形成された強
固な表面固層の模式図で、鉄板の周囲に、鉄板の冷却に
４ｎ生成した一同シエル８が形成され、この２１１より
鋼の流出及びプ、リードの発□
生しな“強！な亡母固層１・８７５゛形成さするも０で
める。Figure 3 is a schematic diagram of a strong surface solid layer formed on the top part by the above treatment.A shell 8 is formed around the iron plate by 4N generated during cooling of the iron plate, and steel flows out from this 211. And the formation of the lead □ "Strong! A dead mother solid layer of 1.875" was formed.
具体例を示せば、次のとおりでろる。A specific example would be as follows.
（１） 鋳屋内寸法：長辺１５００鱈Ｘ短片２５０■
（２） 鉄板寸法：長辺１ｔ５０１１−短片２００ｍ
×厚６ｗｍ
（３）鉄板挿入深さ：メニスカス下約５０ｍ（−）鉄板
水平保持時間：２０〜３０秒（５）処理合計時間＝１分
上記諸条件でこの発明を実施した結果と、従来法の水冷
によるシップ処理法を゛実施した結果の１年間のブリー
ド発生回数の推移を第４因に示す。(1) Dimensions inside the casting: Long side 1500cm x short piece 250cm
(2) Steel plate dimensions: long side 1t5011 - short piece 200m
× Thickness 6wm (3) Depth of steel plate insertion: Approximately 50m below the meniscus (-) Time to hold the steel plate horizontally: 20 to 30 seconds (5) Total processing time = 1 minute The results of implementing this invention under the above conditions and the conventional method The fourth factor shows the change in the number of bleed occurrences in one year as a result of implementing the water-cooled ship treatment method.
この第４図からも明らか擾如く、この発明によりブリー
ド発生が完全に防止できた。As is clear from FIG. 4, the invention was able to completely prevent the occurrence of bleeding.
図面はこの発明の実施例を示し、第１図はこの発明の実
施（用いる鉄板の斜視説明図、第２図〜第３例はトップ
処理手順の説明図、第４図は実施結果の成績を従来法と
比較して表わすグラフである。
ｌ・・・鉄板本体、
２・・・補強板、
３・・・水平状態保持用アングル、
４・・・ガス抜き孔、
５・・・持手。
□
代理人 弁理士 秋 沢 政 光
・ 他２名The drawings show examples of the present invention. Figure 1 shows the implementation of the invention (a perspective view of the iron plate used, Figures 2 to 3 are illustrations of the top treatment procedure, and Figure 4 shows the results of the implementation. This is a graph showing a comparison with the conventional method. 1... Iron plate main body, 2... Reinforcement plate, 3... Angle for maintaining horizontal state, 4... Gas vent hole, 5... Handle. □ Agent Patent attorney Masamitsu Akisawa and 2 others
Claims (1)
形状を有する鉄板を溶鋼湯面下に挿入し、溶鋼の凝固に
よって該鉄板が固定されるまで保持することによ、す、
トップ部に該鉄板と溶鋼の凝固層による表面固層を形成
することを特徴とする一連続鋳造におけるトップ処理方
法。(1) After continuous casting is completed, an iron plate having a shape similar to the horizontal plane inside the casting is inserted below the surface of the molten steel and held until the iron plate is fixed by solidification of the molten steel.
A top processing method in one continuous casting, characterized by forming a surface solid layer on the top portion by a solidified layer of the iron plate and molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10118082A JPS58218344A (en) | 1982-06-12 | 1982-06-12 | Top treatment in continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10118082A JPS58218344A (en) | 1982-06-12 | 1982-06-12 | Top treatment in continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58218344A true JPS58218344A (en) | 1983-12-19 |
Family
ID=14293791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10118082A Pending JPS58218344A (en) | 1982-06-12 | 1982-06-12 | Top treatment in continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58218344A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52117235A (en) * | 1976-03-29 | 1977-10-01 | Hitachi Shipbuilding Eng Co | Congeal method of strand end in continuous casting |
| JPS5725256A (en) * | 1980-07-22 | 1982-02-10 | Kawasaki Steel Corp | Joint fitting for continuous casting of dissimilar kind molten steels |
-
1982
- 1982-06-12 JP JP10118082A patent/JPS58218344A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52117235A (en) * | 1976-03-29 | 1977-10-01 | Hitachi Shipbuilding Eng Co | Congeal method of strand end in continuous casting |
| JPS5725256A (en) * | 1980-07-22 | 1982-02-10 | Kawasaki Steel Corp | Joint fitting for continuous casting of dissimilar kind molten steels |
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